<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Worksheet
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    1.7.9, 2013-06-02
 */


/**
 * PHPExcel_Worksheet_MemoryDrawing
 *
 * @category   PHPExcel
 * @package    PHPExcel_Worksheet
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Worksheet_MemoryDrawing extends PHPExcel_Worksheet_BaseDrawing implements PHPExcel_IComparable {
	/* Rendering functions */
	const RENDERING_DEFAULT = 'imagepng';
	const RENDERING_PNG = 'imagepng';
	const RENDERING_GIF = 'imagegif';
	const RENDERING_JPEG = 'imagejpeg';

	/* MIME types */
	const MIMETYPE_DEFAULT = 'image/png';
	const MIMETYPE_PNG = 'image/png';
	const MIMETYPE_GIF = 'image/gif';
	const MIMETYPE_JPEG = 'image/jpeg';

	/**
	 * Image resource
	 *
	 * @var resource
	 */
	private $_imageResource;

	/**
	 * Rendering function
	 *
	 * @var string
	 */
	private $_renderingFunction;

	/**
	 * Mime type
	 *
	 * @var string
	 */
	private $_mimeType;

	/**
	 * Unique name
	 *
	 * @var string
	 */
	private $_uniqueName;

	/**
	 * Create a new PHPExcel_Worksheet_MemoryDrawing
	 */
	public function __construct() {
		// Initialise values
		$this->_imageResource = null;
		$this->_renderingFunction = self::RENDERING_DEFAULT;
		$this->_mimeType = self::MIMETYPE_DEFAULT;
		$this->_uniqueName = md5(rand(0, 9999) . time() . rand(0, 9999));

		// Initialize parent
		parent::__construct();
	}

	/**
	 * Get image resource
	 *
	 * @return resource
	 */
	public function getImageResource() {
		return $this->_imageResource;
	}

	/**
	 * Set image resource
	 *
	 * @param    $value resource
	 *
	 * @return PHPExcel_Worksheet_MemoryDrawing
	 */
	public function setImageResource($value = null) {
		$this->_imageResource = $value;

		if (!is_null($this->_imageResource))
		{
			// Get width/height
			$this->_width = imagesx($this->_imageResource);
			$this->_height = imagesy($this->_imageResource);
		}

		return $this;
	}

	/**
	 * Get rendering function
	 *
	 * @return string
	 */
	public function getRenderingFunction() {
		return $this->_renderingFunction;
	}

	/**
	 * Set rendering function
	 *
	 * @param string $value
	 *
	 * @return PHPExcel_Worksheet_MemoryDrawing
	 */
	public function setRenderingFunction($value = PHPExcel_Worksheet_MemoryDrawing::RENDERING_DEFAULT) {
		$this->_renderingFunction = $value;

		return $this;
	}

	/**
	 * Get mime type
	 *
	 * @return string
	 */
	public function getMimeType() {
		return $this->_mimeType;
	}

	/**
	 * Set mime type
	 *
	 * @param string $value
	 *
	 * @return PHPExcel_Worksheet_MemoryDrawing
	 */
	public function setMimeType($value = PHPExcel_Worksheet_MemoryDrawing::MIMETYPE_DEFAULT) {
		$this->_mimeType = $value;

		return $this;
	}

	/**
	 * Get indexed filename (using image index)
	 *
	 * @return string
	 */
	public function getIndexedFilename() {
		$extension = strtolower($this->getMimeType());
		$extension = explode('/', $extension);
		$extension = $extension[1];

		return $this->_uniqueName . $this->getImageIndex() . '.' . $extension;
	}

	/**
	 * Get hash code
	 *
	 * @return string    Hash code
	 */
	public function getHashCode() {
		return md5($this->_renderingFunction . $this->_mimeType . $this->_uniqueName . parent::getHashCode() . __CLASS__);
	}

	/**
	 * Implement PHP __clone to create a deep clone, not just a shallow copy.
	 */
	public function __clone() {
		$vars = get_object_vars($this);
		foreach ($vars as $key => $value)
		{
			if (is_object($value))
			{
				$this->$key = clone $value;
			}
			else
			{
				$this->$key = $value;
			}
		}
	}
}
